CVE-2022-29324
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on D-Link DIR-816 routers via a stack overflow in the web interface. Attackers can exploit this without authentication to gain full control of affected devices. Only D-Link DIR-816 A2 routers with specific firmware versions are affected.
💻 Affected Systems
- D-Link DIR-816 A2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to persistent backdoor installation, network traffic interception, and lateral movement to other devices on the network.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as part of a botnet.
If Mitigated
Limited impact if device is behind firewall with restricted web interface access and proper network segmentation.
🎯 Exploit Status
Public exploit code available in GitHub repository; exploitation requires sending crafted HTTP request to vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check D-Link security bulletin for latest patched version
Vendor Advisory: https://www.dlink.com/en/security-bulletin/
Restart Required: Yes
Instructions:
1. Visit D-Link support website 2. Download latest firmware for DIR-816 A2 3. Log into router admin interface 4. Navigate to firmware update section 5. Upload and install new firmware 6. Reboot router
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network segment
🧯 If You Can't Patch
- Replace affected device with supported model
- Implement strict firewall rules blocking access to port 80/443 on router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface and compare with vulnerable version v1.10CNB04Check Version:
curl -s http://router-ip/ | grep -i firmwareVerify Fix Applied:
Verify firmware version has been updated to patched version from D-Link📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/form2IPQoSTcAdd with long proto parameter
- Multiple failed login attempts followed by successful exploit
Network Indicators:
- HTTP requests with unusually long parameters to router management interface
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router.log" AND uri="/goform/form2IPQoSTcAdd" AND proto.length>100